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William C. Keel
Researcher at University of Alabama
Publications - 316
Citations - 13186
William C. Keel is an academic researcher from University of Alabama. The author has contributed to research in topics: Galaxy & Spiral galaxy. The author has an hindex of 59, co-authored 305 publications receiving 12235 citations. Previous affiliations of William C. Keel include Leiden University & National Science Foundation.
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Journal ArticleDOI
The green valley is a red herring: Galaxy Zoo reveals two evolutionary pathways towards quenching of star formation in early-and late-type galaxies
Kevin Schawinski,C. Megan Urry,Brooke Simmons,Lucy Fortson,Sugata Kaviraj,William C. Keel,Chris Lintott,Chris Lintott,Karen L. Masters,Robert C. Nichol,Marc Sarzi,Ramin A. Skibba,Ezequiel Treister,Kyle W. Willett,O. Ivy Wong,Sukyoung K. Yi +15 more
TL;DR: In this article, the authors use SDSS+GALEX+Galaxy Zoo data to study the quenching of star formation in low-redshift galaxies and conclude that the green valley between the blue cloud of star-forming galaxies and the red sequence of quiescent galaxies in the colour-mass diagram is not a single transitional state through which most blue galaxies evolve into red galaxies.
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Galaxy Zoo Green Peas: discovery of a class of compact extremely star-forming galaxies
Carolin N. Cardamone,Kevin Schawinski,Marc Sarzi,Steven P. Bamford,Nicola Bennert,C. M. Urry,Chris Lintott,William C. Keel,John K. Parejko,Robert C. Nichol,Daniel Thomas,Dan Andreescu,Phil Murray,M. Jordan Raddick,Anže Slosar,Alexander S. Szalay,Jan Vandenberg +16 more
TL;DR: In this paper, the authors investigate a class of rapidly growing emission line galaxies, known as "Green Peas", which were first noted by volunteers in the Galaxy Zoo project because of their peculiar bright green colour and small size, unresolved in SDSS imaging.
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Galaxy Zoo 2: detailed morphological classifications for 304,122 galaxies from the Sloan Digital Sky Survey
Kyle W. Willett,Chris Lintott,Steven P. Bamford,Karen L. Masters,Brooke Simmons,Kevin Casteels,E. M. Edmondson,Lucy Fortson,Sugata Kaviraj,William C. Keel,Thomas Melvin,Robert C. Nichol,M. Jordan Raddick,Kevin Schawinski,Robert J. Simpson,Ramin A. Skibba,Arfon M. Smith,Daniel Thomas +17 more
TL;DR: Galaxy Zoo 2 (GZ2) as discussed by the authors is a citizen science project with more than 16 million morphological classifications of 304 122 galaxies drawn from the Sloan Digital Sky Survey (SDSS).
Journal ArticleDOI
The effects of interactions on spiral galaxies. II - Disk star-formation rates
TL;DR: In this article, the influence of interactions on the global star-formation rates of spiral and irregular galaxies was assessed using H-alpha emission-line and IRAS far-IR observations.
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The effects of interactions on spiral galaxies. I - Nuclear activity and star formation
TL;DR: In this article, the authors present results of spectrophotometry of the nuclei of 161 (mostly spiral) galaxies with bright companions, and emission-line imaging of 63 galaxies.